Method and apparatus for measuring dynamic stretch rigidity of outer panel of automobile component

Abstract

[Problem] To provide a technology for measuring dynamic stretch rigidity with increased accuracy. [Solution] A method for measuring dynamic stretch rigidity of an outer panel of an automobile component includes deforming a measured outer panel by pressing an indenter onto a surface of the measured outer panel in a predetermined pressing direction intersecting the surface and with a predetermined load, and measuring a deformed state of the measured outer panel. The method is characterized in that: a grid is transferred onto a surface at a measured site of the measured outer panel; a reference marker is placed in the vicinity of the measured site of the measured outer panel; the grid on the surface of the measured outer panel deformed by the load of the indenter is photographed by a plurality of cameras from a plurality of positions simultaneously and repeatedly while the indenter is pressed onto the surface at the measured site of the measured outer panel with the load, and while the indenter is moved in a direction perpendicular to the pressing direction; and a change in the deformed state of the measured outer panel as a result of the movement of the indenter is measured by calculating three-dimensional position information of the grid on the basis of image data obtained by the photographing and in accordance with correspondence to the reference marker, the change being output as panel deformation data.

Description

Technical field [0001] The invention relates to a method and a device for measuring the dynamic tensile rigidity of an outer panel of a motor vehicle component. Background technique [0002] As one of the performances required for outer panels of automotive parts such as doors, hoods, and roofs, there is dynamic tensile rigidity. In the case of insufficient dynamic tensile rigidity, for example, in wiping operations such as when a moving load is applied to the outer panel along the shape of the panel, such as the palm, cloth, etc., due to snap-through. The so-called dent (べこつき) sound is generated, and the quality of the automobile is greatly impaired. Particularly in recent years, due to the thinning of the vehicle body weight reduction and the diversification of panel designs, there is a tendency for dent noise to be easily generated. For automobile manufacturers, ensuring dynamic tensile rigidity has become a major issue. [0003] The tensile rigidity evaluation of the conventi...

AI Technical Summary

Problems solved by technology

In the case where the dynamic tensile rigidity is insufficient, for example, during wiping operations such as car washing or waxing in which a moving load is applied to the outer panel with a palm, cloth, etc. along the panel shape, the The so-called dent (べこつき) sound is produced, and the sense of quality of the vehicle is greatly damaged

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